Culture is incredibly stubborn. In 1793, during the French Revolution, France tried to change time. They wanted to make everything simple and based on tens. They created 'Decimal Time' where a day had 10 hours, each hour had 100 minutes, and each minute had 100 seconds. People hated it. It was too confusing and ruined their old habits. France gave up on the idea after just 18 months, proving how deeply the 12-hour system is baked into human culture.